A vote is in progress for the 3.7 version of nbm-maven-plugin. Expected to close on Sunday.
Besides an OSGi-related fix mainly affecting our own repository generation, the main change is support for NBI generation; the Ant-based apisupport.installer.maven would be deleted and replaced by goal configuration for the standard mojo.
Associated archetypes are also updated, mainly to improve functional test integration (taking advantage of fixes in 7.1), but also to run the NBI goal by default in the deployment profile.
Using 3.7 ought to fix the symptom of bug #205865. (Existing projects would need to be edited to request the new plugin.)

Integrated into 'releases', will be available in build *201202132200* or newer. Wait for official and publicly available build.
Changeset: http://hg.netbeans.org/releases/rev/768529630e81
User: Jesse Glick <jglick@netbeans.org>
Log: #208211: use archetypes corresponding to nbm-maven-plugin 3.7.
Normalize installer configuration corresponding to MNBMODULE-155.